Floor scraper



0. OLSEN Aug. 13, 1929.

FLOOR SGRAPER Filed Nov. 15, 1927 OTTO Patented Aug. 13, 1929.

UNITED STATES OTTO OLSEN, OF BROOKLYN, NEW YORK.

FLOOR SCRAPEB.

Application filed November 15, 1927. Serial No. 233,439.

My invention is designed particularly for use in connection with the mechanical floor scraper shown and described in my prior application for patent filed September 24:, 1927, Serial No. 221,723, but is also capable of effective and convenient use as a floor scraper by itself, and in other mechanical floor scrapers designed'to receive it.

In the embodiment of my floor scraper lllustrated in my said prior application, the blade held inclined transversely with respect to the direction of motion and downwardly and rearwardly with respect to the floor, and it consists of a flat plate of tool steel which is clamped adjustably in the scraper with its lower transverse edge bent forwardly and downwardly and sharpened to act as the scraping blade proper.

My present improvement comprlses, 1n its present preferred embodiment, a flat metal plate to be clamped adjustably as described in the mechanical floor scraper or held tightly and correspondingly in the hand, said plate having its lower edge inclined up- 7 wardly and laterally with. respect to its side edges and thus to the direction of motion and preferably beveled. On the back of said plate across and registering with its lower edge is fixed the base of a triangular blade clamping block, whose diagonal face 18 thus inclined to the back of the plate and forms a continuation of the beveled lower edge of the plate. To the clamping block is screwed an adjustable clamping plate, whose lower edge coincides with those of the block and holding plate and between the jaws formed by the lower portions of the clamping block and clamping plate is clamped a detachable scraping blade which is thus held and can be adjusted to the most effective position and can be made interchangeable of the highest quality tool steel, without the need of makingits holding plate of such expenslve metal.

In order that my invention may be fully understood, I shall first describe in detail the mode in which I at present prefer to carry my invention into practice and then particularly point out the invention in the claims.

Reference is to be had to the accompanying drawings forming part of this application, in which like parts are designated by the same numbers in all the figures.

Figure 1 is a sectional side elevation illustratlng a blade holder and blade embodying my present inventlon held in a mechanical floor scraper of the type illustrated in my.

said prior application.

Figure 2 is a rear view of the detachable blade holder and blade.

Figure 3 is an enlarged cross-sectional View of the same.

In the drawings, 3 designates the blade holding body of the said mechanical floor scraper, 4 its flat back and 5 its fiat face, both inclined transversely with respect to the direction of travel, and downwardly and rearwardly with respect to the floor; 8 designates the blade holding plate seated against the flat back l, and 9 the clamping jaw by which the blade holding plate is held adjustably against the back 4, in a like transversely and. longitudinally inclined position, all substantially as described in my said prior application for patent.

Instead of making the plate 8 of tool steel and bending its lower edge forward to form the scraping blade proper, I in my present improvement cut the lower edge 19 of the plate-8 at an inclination laterally and upwardly with respect to its side edges and bevel said. lower edge 19 downwardly and forwardly, and I fix across the lower part of said plate a clamping block 10 in this instance triangular in cross-section, having a diagonal clamping face 11, inclined downwardly and forwardly to coincide with the beveled edge which forms a continuation of the inclined face 11. On the clamping face 11, is secured adjustably a clamping plate 12 by screws 13 passing through apertures in the plate 12, into corresponding threaded screw holes 14; in the clamping block 10, and the lower edge of the clamping plate 12, is inclined laterally and upwardly to coincide with the inclined beveled edge 19 of the plate 8.

Between the clamping block 10 and clamping plate 12 is held adjustably a detachable scraping blade 15, with its lower sharpened edge inclined laterally and upwardly with respect to the side edges of the plate 8 to correspond with the lower edges 19 of the same and the clamping plate 12 and block 10.

The scraping blade can thus be adj usted between the clamping plate and block to project therefrom the desired or most effective degree, and can easily be detached therefrom for resharpening or renewal.

It Will be seen by inspection of Figure 1, that When the plate 8 is clamped in the mechanical floor scraper, as described in my said prior application, the scraping blade will be held at the most efiective angle and projection with respect to the direction of motion and to the floor, and the lower edge 16 of the clamping plate 12 which is beveled, will act also as a guard to guide and limit the penetration of the blade 15.

The blade and blade holder can be used as a hand floor scraper, without the mechan- 15 a hand at the ical' carrier, by holding it and moving same angle over the floor. It is evident that specific details of the embodiment of my invention here illustrated a by hi may be varied without departing from the boundaries of my invention as defined by the following claims.

I claim as my invention:

1. A floor scraper comprising a flexible blade holding plate thin in proportion to its length, and a scraping blade clamped immediately adjacent to and rigidly against and across the lower end of the holding plate so that its cutting edge projects forward of the front face of said plate.

2. A floor scraper in accord with claim 1 in which the bevelled face of the scraping blade is on the side farther from the holding ade.

In testimony whereof I aflix my signature',

OTTO OLSEN 

